Differential gearing



J. C. BUGART.

DIFFERENTIAL GEARING. APPLICATION FILED Nov. I5,V 1918.

J. C. BOGART.

DIFFERENTIAL GEARING.

APPLICATION FILED Nov. I5, I9I8.

1,351,737. PatentedSept. 7,1920.

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DIFFERENTIAL Giannino. I

Application .-ieanovemter 15, 191s. 'serieu No. aeatei.

and State'o'f. Michigan, have invented certain newfand useful improvements in Differfential Clearing, of which the following is a specification.

rl`his invention relates to differential gearing for motor vehicles and the like, and

y more particularly to the differential which i wheel. 4

providesv for one drive wheel'travelingat va different speed than the opposite drive One objectV of the invention is to impartk a positive drive or movement to both ydrive wheels, and yet admit of the outer wheel traveling faster than the inner wheel when the vehicle 1s turning a corner.

With the above and other obgects in view, I

the present invention consistsin the combi nationV and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claims, it being understood that changes may be made in the size, proportion and minor details without departing from the spirit, or sacriicing any of the advantages of the'invention.

ln the drawings: c Figure 1 is a front view of a differential gearing embodying my invention. v Fig. 2 isv a side view thereof.

Fig. 3 is a sectional 'view taken on the line B--B of Fig. 1.

` Fig. 4 is also` a section taken on the line p D-D of Fig. 2'. .o v

F ig. 5 is an enlarged detail showing the parts in different positions, and

Fig. 6 is a sectional detail. I 'Y Referring now more lparticularlyfto the drawings. The 'numeral 1 indicatesV the drive shafts of the drive axles of any motor vehicle.l A shortshaft 2is interposed be- -tween the inner ends, and is in line 'with the drive shafts 1. YThis short shaft 2 receives a drive gear 3 which is supported thereon, and which may be of any suitable type such as is adapted to receive thedrivl ing force of the motor or other power plant it flat disk or platefk, recessed as shown in Figs. 5 and 6 lis -disposedV at eachviside` BAY crrnavioiiienn, Assrencnor ONE-HALF .To PAUL n. i DINsMoRE, or BAYVCITY, ifrcnrennl specification of Lttersrateat. yrelatant-ed"Sept, 7 19120.

ofthe drive gear 3, and is keyed'or 'other- Y y wise suitably secured on the short shaft 2. f

One or more forked leversA 5 are pivoted to y i each of the platesl by means of suitable pivot fastenings 6,V and each of the forks havemounted thereon a small roller member indicatedby the numerals 7 and 7a, which VVare yadapted to roll on the surface .8 of the .recessed portion19 of the plate, the opposite Vend of the' lever being provided withA an opening adapted to receive the end of a bolt member-'10 which is secured to the drive gear 8, and whichl is actuated thereby.

Ratchet elements areV located on one side of each plate 4L, and arekeyedor otherwise suitably secured to they drive shaft 1` so as v to rotate therewith. Each 4ofthese ratchet elements comprises a flat diskxor plate 11 'formed with allateral flange-12 ywhich is internally toothed as indicated at 13, and having a hub M which receives the contiguous ends of the4 drive shafts 1 holding them in line. Y

Arcuate slots 15 are formed in the plates 4L near the outer ledge thereof, and iu which Vare adapted .to operate the `pin members 16,

carried 'by the drive wheel@ andwhich pro ject laterally therefrom. 1 Pivotedto the recessed portion ofthe platemembers Llare the dog members 17 and 17a, extending in the teeth 13 0f the platesoll.

Pockets 18 are formed in the surfacelt)v of the disks orplates 4:, and in which are opposite directions .and adapted to engage disposed to be seated one end of the eXpansible helical springs .20, said springs being vand 2, therebv` interposed between the pockets 18 and the .underside'of the dogs 17 and 17 to normally hold the said dogs in afgivenposition and admit of their yielding,l so that the ratchet elements on one of the plates may travel lfaster than the ratchet elements 0n the other plate when the vehicle is turning a corner.

, The internallyvtoothed flange 12 of the member 11, faces inwardlypover the plate 4l,

`and is engaged by the outer ends of the spring actuated dogs 17 and 17, and when movement of the pin member Ocauses the lever to rock on its pivot 6, and the rollers 'Y and'Y 721 move to the right, one of the dogs 5 is disengaged from the teeth 13 by the action of the roller thereon, while Ythe opposite.

rolier rolls off the opposite Vdog member and allows it to spring into engagement with the teeth 13, the movement of the lever 5 be- 20 internally toothed [disks 1,1, and is composed of two parts, v'consisting ofthe disksv 21 having inwardly extending rims or flanges Vandhubs to receive theends of the shafts 1. These disks are spaced'apart by suitable spacers and fare connected rby bolts or other fastenings 2d. Y

F rom the foregoing description it willbe Vreadily understood that while both drive wheels are positively rotated, still one wheel may rotate faster than the other, as is necessary when a vehicle is turning.

AWhen power is applied to the drive gear t0 rotate the same in an anti-clock-wise direction, the dogs andlever 5 assume the position -A- as shown in dotted lines lin Fig. 5, the pin 10 moving to the left, rocking the lever 5 onits pivot, the roller 7 then rolls off and away from the kdog member 17, thereby releasing same and allowing it to be sprung liofinto engagement with the teeth 13 of the member 11, the opposite roller 7a also moving to the right and Von the dog member 17a, thus'forcing it down andv out of engagement with the teeth 13, where it is held until'the lever 5 is again actuated. `Simultaneously with the movement of the'lever 5 and the rollers carried thereby, the pin member 16 travels to the left hand-end of the arcuate slot 15 and imparts'motion to the plates t.-

vWhen the drive gear 3 is rotated in a clock- Y wise direction the parts assume the position as indicated at -B- in Fig. 5.

F rom the foregoing description it will beV obvious that 1 have perfected a new andinexpensive differential gearing, which pro- 4 Vvides a positive drive for both wheelsfof a motor-vehicle, and which will also permit of one wheel traveling faster than the other when required. Y

Claims: f

1. 1n a differential gearing the combination of opposite drive shafts, a drive gear disposed between the drive shafts, driving elements located at opposite sides of the i the'levers toshiftrthe latter.

drive gear and having a limited movement independent of the saine, ratchet elements mountedy on the drive shafts, opposite dogs carried by the driving elements Yand arranged to engage the ratchet elements, and

shiftable rmea-ns operating between the' dogs and connected with and actuated by the A mounted on the driveshafts, oppositedogs c carried by the driving elements 'andar-` ranged toengage the vratchet elements, and

*pivoted shiftable levers' Aoperating between the dogs and connected Vwith and actuatedY by .the driveV gear yand provided at their@ outer ends with opposite arms having antifriction devices arranged to engage the dogs Y to move one dog out of engagement with each of the ratchet elements and permitanother dog to engage the same.

3. 1n a differential gearing the combinationV of opposite drive shafts, a drive gear disposed between the drive shafts, driving elements located at opposite sides ofthe drivegear and having a limited movement independent of the same, 'ratchet elements mounted on the drive shafts, opposite dogs carried by the driving elements and arranged to engage the ratchet elements, pivotally mounted levers operatingbetween the dogs and provided at theirv outer ends with means forcontrolling the same and having forked inner ends and means vcarried by the drive gear for engaging the forked ends of 4c. In a differential drive gear, the combination of opposite drive shafts, a drive gear disposed between the shafts,. drive disks located at Vopposite sides ofthe drive gear and having a limitedv movement independently thereof and p rovidedv with peripheral recesses, spring actuated dogs mounted on the drive disks and' arranged inY pairs,V4

`ratchetelements carried by the drive shafts and arranged tobe engaged by thedogs, and shiftabl'e levers located between the dogs and Vhavingrollers operating in` the i saidrecesses of the drive disks and arranged toengage the dogs for controlling the same, said levers being'connected4 with and actuated bythe said drive gear.

' 5. In differential gearing the combination of opposite drive shafts, a short intermediate shaft disposed between the drive shafts, a drive gear mounted on the intermediate shaft, drive disksl arranged on the intermediate shaft at opposite sides of the drive gear, said drive gear land disks having' a.Y otally mounted on the drive disksand oper-V siot and pin connection to permit a limited ating betvveen the members of'each pair of independent movement of the disks With re- Vdogs and provided with means for controL 10 lation to the drive gear,l ratchet' Wheels ling the same, said levers being Connected mounted on the drive shafts, dogs arranged with and actuated by the drive gear.

in pairs and carried by the drive disks for In testimony whereof I affix my sio'nature.

engaging the ratchet Wheels and levers vpiv- 1 JOHN C. BOGRT.

V1,351,737 Y Y Se 'l 

